基于MVCT图像引导技术的全身一体化固定板在全中枢螺旋断层放射治疗中的固定效果

发布时间：2018-03-14 21:28

本文选题：中枢神经系统肿瘤　切入点：螺旋断层放射治疗　出处：《肿瘤》2017年07期 　论文类型：期刊论文

【摘要】：目的:应用螺旋断层放射治疗系统的兆伏级CT(megavoltage CT,MVCT)图像引导技术来分析全身一体化固定板在全中枢放疗中的固定效果。方法:回顾性分析10例全中枢放疗患者的摆位误差。所有患者均取仰卧位,并采用全身一体化固定板结合热塑网膜对其进行体位固定。对螺旋断层放射治疗前采集的MVCT图像与定位时的千伏级CT(kilovoltage CT,KVCT)图像进行匹配,从而获得6个自由度方向上的摆位误差。匹配满意后可进行螺旋断层放射治疗;如果匹配不满意,并经放疗科临床医师确认后,需要对患者进行二次摆位。结果:对10例患者共采集159次MVCT图像。左右(left-right,LR)、头足(cranial-caudal,CC)、腹背(anterior-posterior,AP)、pitch、roll和yaw方向上的摆位误差分别为(1.94±1.44)mm、(2.98±2.51)mm、(1.71±1.87)mm、(0.73±0.64)°、(0.30±0.26)°和(0.34±0.31)°。需要进行二次摆位的次数为5次(3.14%)。结论:MVCT图像引导技术可以显著减少全中枢放疗患者的摆位误差。仰卧位全身一体化固定板在全中枢螺旋断层放射治疗中的固定效果是可以被接受的。
[Abstract]:Objective: to analyze the effect of systemic integrative fixation plate in the whole central radiotherapy by using spiral tomography radiotherapeutic system (SCRT) image guidance technique. Methods: the pendulum of 10 patients with total central radiotherapy were analyzed retrospectively. Position error. All patients were supine. The whole body fixation plate combined with thermoplastic omentum was used to fix the body position. The MVCT images collected before the helical tomography radiotherapy were matched with the kilovolt CT(kilovoltage CT images. After satisfactory matching, helical tomography radiotherapy can be carried out. If the matching is unsatisfactory, and confirmed by the clinician of radiotherapy department, Results: a total of 159 MVCT images were collected from 10 patients, including left and right right right LRV, cranial cranial-caudal occlusal (CCN), and the errors in the direction of Pitchroll and yaw were 1.94 卤1.44 mm and 1.71 卤1.87 卤0.64 掳0.30 卤0.26 掳and 0.34 卤0.31 掳, respectively. The number of times that two pendulums needed to be performed was 3.1414 卤0.31 掳, and the results were as follows: 1.94 卤1.44 卤2.51 卤1.71 卤1.87 卤0.64) 掳0.30 卤0.26 掳and 0.34 卤0.31 掳respectively, and the number of times that two pendulations needed to be carried out were 3.1414 卤0.34) 掳. The results were as follows: 1 卤1. 44 卤1. 44 卤1. 71 卤1. 87 卤0. 64 卤0. 30 卤0. 26) 掳and 0. 34 卤0. 31 掳respectively. It is concluded that the image guidance technique of MVCT can significantly reduce the positioning error of patients with total central radiotherapy. The fixation effect of the supine whole body integrated fixation plate in the whole central spiral tomography radiotherapy is acceptable.
【作者单位】：复旦大学附属中山医院放疗科;
【分类号】：R730.55

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